Ответ:
Решение:
- \(3x + 18 = 5x - 4\)
\(18 + 4 = 5x - 3x\)
\(22 = 2x\)
\(x = \frac{22}{2}\)
\(x = 11\) - \(6x - 2(2x + 8) + 1 = -6x + 9\)
\(6x - 4x - 16 + 1 = -6x + 9\)
\(2x - 15 = -6x + 9\)
\(2x + 6x = 9 + 15\)
\(8x = 24\)
\(x = \frac{24}{8}\)
\(x = 3\) - \(\frac{6x - 6}{5} = \frac{3x + 4}{10}\)
Умножим обе части на 10:
\(10 \cdot \frac{6x - 6}{5} = 10 \cdot \frac{3x + 4}{10}\)
\(2(6x - 6) = 3x + 4\)
\(12x - 12 = 3x + 4\)
\(12x - 3x = 4 + 12\)
\(9x = 16\)
\(x = \frac{16}{9}\)
Ответ: 1) 11; 2) 3; 3) \(\frac{16}{9}\).
